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CN110406134A - A kind of method of forming carbon fiber reinforced thermolplastic composite material part - Google Patents

A kind of method of forming carbon fiber reinforced thermolplastic composite material part Download PDF

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Publication number
CN110406134A
CN110406134A CN201910707800.XA CN201910707800A CN110406134A CN 110406134 A CN110406134 A CN 110406134A CN 201910707800 A CN201910707800 A CN 201910707800A CN 110406134 A CN110406134 A CN 110406134A
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China
Prior art keywords
carbon fiber
fiber reinforced
composite material
forming
plate
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CN201910707800.XA
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CN110406134B (en
Inventor
王礼良
孙雨豪
蔡昭恒
栾禧
丹尼斯J.波利蒂斯
奥马尔·伊法基尔
朱明清
吴冈
林建国
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Imperial Technology Innovation Co Ltd
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Imperial Technology Innovation Co Ltd
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Priority to CN201910707800.XA priority Critical patent/CN110406134B/en
Publication of CN110406134A publication Critical patent/CN110406134A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28Shaping operations therefor
    • B29C70/40Shaping or impregnating by compression not applied
    • B29C70/42Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
    • B29C70/46Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Composite Materials (AREA)
  • Mechanical Engineering (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Moulding By Coating Moulds (AREA)

Abstract

A kind of method of forming carbon fiber reinforced thermolplastic composite material part, the present invention relates to a kind of manufacturing process of fibre reinforced thermoplastic composite.It solves the problems, such as that the stamping needs of the prior art take a significant amount of time and the energy.It is realized by following step: fibre reinforced Thermoplastic Laminates being heated rapidly to critical forming temperature, the rate of heat addition is within the scope of 20-60 DEG C/s;Plate is kept the temperature under a certain pressure;Hot sheet is quickly transferred in cold mold, hot plate material is in soft state always;The pressure of plate cold mold is struck out into required shape;And drip molding is quenched to by room temperature with critical hardening rate.The invention proposes a kind of new quick thermo shaping methods, can be used for producing complex-shaped enhancing thermoplastic composite part.Meet the requirement produced in enormous quantities in auto industry for part, can will shorten to the production cycle within 15 seconds.The intensity of drip molding can reach the 90% of former plate property.

Description

A kind of method of forming carbon fiber reinforced thermolplastic composite material part
Technical field
The present invention relates to a kind of manufacturing process of fibre reinforced thermoplastic composite, belong to composite formed neck Domain.
Background technique
Fibre reinforced thermoplastic composite has extensive in the application of aerospace, aircraft and auto industry Produce the potentiality of lightweight construction component.Currently, high-pressure resin transfer modling shapes (High Pressure Resin Transfer Moulding manufacture enhancing thermoplastic composite auto parts and components) are applied to.However, due in the technology injection and The solidification process duration is longer, it is desirable to carry out large-scale production using the technology and have very big difficulty.In the art, make Enhancing Thermoplastic Laminates are carried out with convection furnace or infrared heating heating furnace stamping, required a great deal of time and energy Source.If the production cycle of thermoplastic composite part process can be foreshortened within 1 minute, carbon fibre reinforced composite It will be more widely used in automobile lightweight construction component, to reach mitigation weight, reduce the purpose of cost.
Summary of the invention
The present invention provides a kind of method of forming carbon fiber reinforced thermolplastic composite material part, to solve the prior art Stamping needs take a significant amount of time and the problem of the energy.The present invention is realized by following step:
One, fibre reinforced Thermoplastic Laminates are heated rapidly to preset temperature, which is critical forming Temperature T, the rate of heat addition is within the scope of 20-60 DEG C/s;
Two, plate is kept the temperature under a certain pressure;
Three, hot sheet is quickly transferred in cold mold, hot plate material is in soft state always;
Four, the pressure of plate cold mold is struck out into required shape;And drip molding is quenched with critical hardening rate To room temperature.
The invention proposes a kind of new quick thermo shaping method, this method can be used for producing in enormous quantities complex-shaped increasing Heat-flash plastic composites part.Thermoplastic composite of the present invention is the material for preferably comprising matrix and reinforcement.For Meet the requirement produced in enormous quantities in auto industry for part, the present invention provides a kind of production work of low-energy-consumption high-efficiency Skill can will shorten within 15 seconds the production cycle.By carrying out the quick hot forming experiment of thermoplastic composite, the technology Feasibility verifying has been obtained.Drawn experimental test, the intensity of drip molding can achieve the 90% of former plate property.
The technology forming process be between plate and cold mold under non-isothermal condition by fibre reinforced thermoplastic composite Plate stamping is at required geometry.Thermoplastic Laminates are heated using high-power contact-type heating device first To temperature appropriate, which is slightly below resin melt temperature.The contact heating device may be implemented the rate of heat addition be up to 60 DEG C/ S's is rapidly heated, and can significantly shorten the time of heating composite board.With will heat and softened composite wood Flitch is quickly transferred in shaping dies, then applies certain pressure in cold mold, needed for composite board is struck out Part, and room temperature can be quenched into the rate of temperature fall of 30 DEG C/s.
The part strength that the present invention shapes has reached performance before the thermoplastic composite material board material thermoforming after tested 90%.With conventional thermoplastic's composite board forming compared with, present invention reduces in forming process to thermoplastic composite material The time of material heating and heat preservation, so that production efficiency can not only be improved, energy-saving effect is also very significant.It is related in forming process Heating, heat preservation, transfer, forming, quenching process total production cycle can foreshorten within 15 seconds, generally at 15 to 30 seconds, slightly It is long then be 60 seconds, no longer than 120 seconds.
Detailed description of the invention
Fig. 1 is the temperature curve and schematic diagram of quick thermoformed carbon-fibre enhancing thermoplastic composite;Fig. 2 is carbon fiber Tie up the U-shaped formed parts picture of reinforced polyether ether ketone composite material (CF/PEEK);Fig. 3 is the stretching examination of molded part and raw material Test stress-strain curve.
Specific embodiment
Specific embodiment 1: illustrating present embodiment below with reference to Fig. 1, the manufacturing process of part passes through following step reality It is existing:
One, fibre reinforced Thermoplastic Laminates are heated rapidly to preset temperature, which is critical forming Temperature T is slightly below the resin melt temperature of Thermoplastic Laminates.The rate of heat addition is within the scope of 20-60 DEG C/s.Heating The selection of rate and forming temperature depends on the complexity of drip molding.
Critical forming temperature T can be used to determine using the following method: plate is heated to after different temperatures to material items Performance compares, to determine material melt temp, it is ensured that material has softened enough before forming.For plastics, rubber The melting temperature of equal materials, laboratory generallys use differential scanning calorimeter (i.e. DSC) and measures.The instrument passes through thermocouple The variation of collection material hot-fluid during lifting/lowering temperature, is depicted as curve, since material can largely absorb heat in fusing point, curve Occurs sharp peak here, peak temperature is the material melt temp.
Two, after plate is heated to preset temperature, it is kept the temperature under a certain pressure.With traditional hot forming composite material phase Than soaking time needed for the invention is extremely short.
Soaking time determines using the following method: surface characteristics of the comparison plate after different soaking times, to avoid keeping the temperature Overlong time or the too short destruction for material surface characteristic guarantee the outstanding surface quality of formed parts.
Three, hot sheet is quickly transferred in cold mold, hot plate material in the temperature of plate not less than before required forming temperature Always it is in soft state.
Passing time of the plate from heating equipment to shaping dies is determined using the following method: by test of many times and data board The temperature-fall period being placed in air is taken out in the slave heating equipment of material, determines the time.
Four, required shape will be struck out under the pressure of plate cold mold.And drip molding is quenched with critical hardening rate Fire is to room temperature.
It determines required forming pressure and critical hardening rate using the following method: testing and compare in different quenching rates Under forming pressure, the properties and surface characteristic of drip molding guarantee the outstanding surface quality of formed parts.
Specific embodiment 2: illustrating present embodiment below with reference to Fig. 1, Fig. 2 and Fig. 3.Present embodiment and tool One difference of body embodiment is that the selection fibre reinforced of the fibre reinforced thermoplastic composite in present embodiment is poly- Ether ether ketone (CF/PEEK) composite material.The part is " u "-shaped component, is the part for automobile.Composite material plate thickness 2.5mm。
Step 1 uses high-power contact-type heating device, which may be implemented the rate of heat addition and be up to 60 DEG C/s is rapidly heated, heating time can reach critical forming temperature T between 3 seconds to 5 seconds.The soaking time of step 2, Between between 0.5 second to 2 seconds.The cool time of step 4 is 6 seconds to 8 seconds, reaches the rate of temperature fall of 40 DEG C/s.
After taking above-mentioned measure, the entire production cycle was shortened within 15 seconds.After tested, the part strength of forming reaches The 91% of performance before the thermoplastic composite material board material thermoforming.Fig. 3 shows the drawing of part part and raw material after molding Proof stress-strain curve is stretched almost to be overlapped.
Other steps are same as the specific embodiment one.
Specific embodiment 3: present embodiment defines in step 2 relative to embodiment two, mold dwell pressure In critical contact pressure limit, mold dwell pressure is 1MPa to 20MPa;The quenching of step 4 is drip molding in cold mold It is cooling.
Other steps are identical with embodiment two.

Claims (10)

1. a kind of method of forming carbon fiber reinforced thermolplastic composite material part, it is characterised in that it passes through following step reality It is existing: one, fibre reinforced Thermoplastic Laminates are heated rapidly to preset temperature, which is critical forming temperature T, The rate of heat addition is within the scope of 20-60 DEG C/s;
Two, plate is kept the temperature under a certain pressure;
Three, hot sheet is quickly transferred in cold mold, hot plate material is in soft state always;
Four, the pressure of plate cold mold is struck out into required shape;And drip molding is quenched to by room with critical hardening rate Temperature.
2. a kind of method of forming carbon fiber reinforced thermolplastic composite material part according to claim 1, feature exist Can be used to determine using the following method in critical forming temperature T: plate is heated to after different temperatures to material properties into Row comparison, to determine material melt temp, it is ensured that material has softened enough before forming.
3. a kind of method of forming carbon fiber reinforced thermolplastic composite material part according to claim 1, feature exist It is determined using the following method in soaking time: surface characteristics of the comparison plate after different soaking times, to avoid soaking time mistake The long or too short destruction for material surface characteristic guarantees the outstanding surface quality of formed parts.
4. a kind of method of forming carbon fiber reinforced thermolplastic composite material part according to claim 1, feature exist In using the following method determine passing time of the plate from heating equipment to shaping dies: pass through test of many times and record plate from The temperature-fall period being placed in air is taken out in heating equipment, determines the time.
5. a kind of method of forming carbon fiber reinforced thermolplastic composite material part according to claim 1, feature exist In determining required forming pressure and critical hardening rate using the following method: testing and compare in different quenching rates and forming Under pressure, the properties and surface characteristic of drip molding guarantee the outstanding surface quality of formed parts.
6. according to claim 1 to a kind of forming carbon fiber reinforced thermolplastic composite wood described in any one of 5 claims Expect the method for part, it is characterised in that fibre reinforced thermoplastic composite selects carbon fiber reinforced polyether-ether-ketone composite wood Material, the part are " u "-shaped component, composite material plate thickness 2.5mm.
7. a kind of method of forming carbon fiber reinforced thermolplastic composite material part according to claim 6, feature exist High-power contact-type heating device is used in step 1, which may be implemented the rate of heat addition and be up to the fast of 60 DEG C/s Speed heating, heating time can reach critical forming temperature T between 3 seconds to 5 seconds;The soaking time of step 2, extremely at 1.2 seconds Between 1.5 seconds;The cool time of step 4 is 7 seconds to 8 seconds, reaches the rate of temperature fall of 30 DEG C/s.
8. a kind of method of forming carbon fiber reinforced thermolplastic composite material part according to claim 7, feature exist In step 2, for mold dwell pressure in critical contact pressure limit, mold dwell pressure is 1 MPa to 20 MPa.
9. a kind of method of forming carbon fiber reinforced thermolplastic composite material part according to claim 7, feature exist It is that drip molding is cooling in cold mold in the quenching of step 4.
10. a kind of method of forming carbon fiber reinforced thermolplastic composite material part according to claim 1, feature exist Then it is used for the part of automobile.
CN201910707800.XA 2019-08-01 2019-08-01 Method for forming carbon fiber reinforced thermoplastic composite material part Active CN110406134B (en)

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